25 CFR 169.54: What are the consent requirements for service line agreements?

(a) Before the utility provider may begin any work to construct service lines across tribal land, the utility provider and the tribe (or the legally authorized occupants or users of the tribal land and upon request, the tribe) must execute a service line agreement.

(b) Before the utility provider may begin any work to construct service lines across individually owned land, the utility provider and the owners (or the legally authorized occupants or users) must execute a service line agreement.